6513823847 has 4 divisors (see below), whose sum is σ = 6515073840. Its totient is φ = 6512573856.

The previous prime is 6513823843. The next prime is 6513823879. The reversal of 6513823847 is 7483283156.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6513823847 - 2² = 6513823843 is a prime.

It is a super-2 number, since 2×6513823847² = 84859802219491758818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6513823843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 617147 + ... + 627612.

It is an arithmetic number, because the mean of its divisors is an integer number (1628768460).

Almost surely, 2^6513823847 is an apocalyptic number.

6513823847 is a deficient number, since it is larger than the sum of its proper divisors (1249993).

6513823847 is a wasteful number, since it uses less digits than its factorization.

6513823847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249992.

The product of its digits is 967680, while the sum is 47.

The square root of 6513823847 is about 80708.2638086088. The cubic root of 6513823847 is about 1867.5776586124.

The spelling of 6513823847 in words is "six billion, five hundred thirteen million, eight hundred twenty-three thousand, eight hundred forty-seven".